Device for splitting stone.



No. 820,848. PATENTBD MAY 15, 1906. J. P. GUPPS.

DEVICE FOR SPLITTING STONE.

APPLICATION FILED JAN.11. 190s.

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WITNESSES: INVENTOH JAM E s F C 0 P PS A TTOHNE Y8 PATENTED MAY 15,1906.

J. F. OOPPS.

DEVICE FOR SPLITTING STONE.

APPLICATION FILED JAN.11. 1906.

2 SHEETS SHEBT 2.

CHANNELLER CUT AS CUT WITH VNDERCl/TT R M Z r ND WASTE y W m m/ M D M/BLOCKAS LIFTED WITH WEDGES P m. HP M 00 M r W N A V WF 5 E M A J UNITEDSTATES Pn'rEn'r orrioE.

Specification of Letters Patent.

Patented May 15, 1906.

Application filed January 11,1906. Serial No. 295,558.

To aZl whom it may concern.- Beit known that I, JAMES FRANCIS Corps, acitizen of the United States, and a resident of Alberene, in the countyof Albemarle and State of Virginia, have made certain new and usefulImprovements in Devices for Splitting Stone, of which the followingis aspecification.

My invention is an improvement in. the splitting of stone and itconsists in the novel construction, as will be hereinafter described andclaimed.

In the drawings, Figure 1 is a top plan view, partly broken away,illustrating the operation of my invention. Fig. 2 is a vertical sectionon about line 2 2 of Fig. 1. Fig. 3 is a detail side View, and Fig. 4- adetail top plan view, of one of the sectional Wedges. Fig. 5 is a sideview illustrating the breal formed in the practice of my invention. Fig.6 is a side view illustrating the break produced in the ordinary methodof splitting stone. Fig. 7 is a view illustrating the waste experiencedin quarrying stone in the ordinary manner, and Fig. 8 illustrates themanner in which waste is avoided by the practice of my invention.

Ordinarily in breaking stone Witn Wedges the wedges are arranged tooperate in the outer ends of the holes drilled in the body of rock, andin such case the stone usually splits with a downward course, asindicated. at A in Fig. 6, and there is much waste of rock as well. asthe inconvenience resulting from facing the stone off level.

By my invention I form the drill-holes B nearly through the body 0 ofstone to be split, the said body of stone usually being separated at itsback D from the mass of stone by a channel cut by any suitablechanneling means and the inner end walls B of the holes B forming a stopto limit the insertion of the wedge in the use of the invention Inpractice I prefer in splitting off a horizontal slab, as-illustrated inFigs. 1 and 2, to arrange the wedges to operate at the opposite ends ofthe adjacent drill-holes, so that one wedge will operate in the extremeinner end of its drill-hole and the wedge in the next drill-hole will beat the outer end of its drillhole, and so on throughout the series, sothat the splitting action is exerted at the opposite ends of theadjacent drill-holes, whereby I am able to get an even lifting action onthe slab which. it is desired to split from the body of rock, and theline of division will be approximately horizontal throughout. This isillustrated in Fig. 2, in which the lower wedge operates in the extremeinner end of its drillhole, the next upper wedge in the outer end of itsdrill-hole, the next wedge in the inner end of its drill-hole, and so onthroughout the series, so that as the stone is split the split ting willbe effected. in approximately a straight plane. In securing this resultit will be noticed I form a series of holes having generally the samedirection longitudinally and arranged approximately in a common plane,the holes extending nearly through the body of stone to be split and asplitting force being subsequently exerted in the direction in which itis desired to separate stone, such splitting force being exerted in theextreme inner or closed ends of some of said holes and in the extremeouter or open. ends of some adjacent holes, whereby to secure asplitting of the body of stone in approximately a straight plane.

In Figs. 1, 2. 5, and 6 I illustrate the split ting of the'stone inapproximately a horizontal plane. Manifestly the same advantageousresults may be secured by my improve ment insplitting stone inapproximately a vertical plane.

The wedges E preferably include the tapered plug F, the tapered feathers(l, and a wire H, forming a breakable connection between the smallercnds of the plug F and the smaller ends of the feathers G, so theplugand feathers will be uni ted for convenience in applying the wedge andinserting the feathers to the extreme inner ends of the drillholes, asshown in Fig. 2, and which wire will be broken by the initial blow uponthe plugs F in driving the same to split the stone. This breakableconnection not only facilitates the insertion of the wedge as desired,but also provides for its manipulation to permit the turning of thefeathers to secure their operation either vertically or horizontally, asmay be desired in the practical use of the invention.

In practice the feathers G may, combined with the plug, be circular,octagonal, or of other suitable shape in cross-section.

IOO

Having thus described my invention,what openings and forming a breakableconnection Iclaim as new, and desire to secure by Letfor theWedge-sections, substantially as set ters Patent, isforth.

A Wedge for use in splitting stone compris- 3 J ARIES FRANCIS COPPS. 5ing the tapered feathers, and the taperedl Witnesses:

plug having coincident openings near their SoL KAUFMAN,

smaller ends and means passing through said I GnF. COMPTON.

